Quite a few of my RF customers who need coating choose parylene N. That
could make it too expensive though.

Lloyd Duso
Plant Manager
Diamond-MT
(814) 535-3505
www.Diamond-mt.com

On Fri, Dec 1, 2017 at 12:34 PM, Yuan-chia Joyce Koo <[log in to unmask]>
wrote:

> since it is RF module, he might not have choice to conformal coat, unless
> he got OK from the designer...
> jk
> On Dec 1, 2017, at 12:21 PM, Ed Popielarski wrote:
>
> Have you considered conformal coat the module, then hand solder with OA &
>> wash?
>>
>>
>> Regards,
>>
>> Ed Popielarski
>> Engineering Manager
>>
>>
>>                                970 NE 21st Ct.
>>                               Oak Harbor, Wa. 98277
>>
>>                               Ph: 360-675-1322
>>                               Fx: 206-624-0695
>>                               Cl: 360-544-2289
>>
>>
>> "Nearly all men can stand adversity, but if you want to test a man's
>> character, give him power."    Abraham Lincoln
>>
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Collins
>> Sent: Friday, December 01, 2017 9:09 AM
>> To: [log in to unmask]
>> Subject: [TN] board wash / non-washable modules - the dilemma
>>
>> Hello Technet!
>>
>> Wondering what other people are doing with this dilemma.
>>
>> We have had several customers design in pre-built RF modules on their
>> boards.  I totally get why, it is a pre-built, FCC approved, easy solution
>> - the fastest way to get a good Wi-Fi or bluetooth solution.
>>
>> Where things go off the rails for me are where this is used in a high
>> humidity application (e.g. a marine setting).  We strongly prefer to wash
>> boards, we can build no-clean if needed but I'd prefer not to for an on the
>> water use.  But the part a customer has designed in specifically says not
>> to wash it (it has an EMI shield, so they are properly concerned with water
>> entrapment).
>>
>> So - would you:
>>
>>  - build it no-clean?
>>  - leave the part off, build and wash as usual, install RF module later
>> using no-clean?
>>  - wash it (and maybe bake it to dry it out)?
>>  - ????
>>
>> --
>> regards,
>>
>> Graham Collins
>> Senior Process Engineer
>> Sunsel Systems
>> (902) 444-7867
>>
>